Amazon.com Inc.’s sales contracts with some of the world’s biggest publishers, Simon & Schuster and HarperCollins, are next up for renewal, signaling that skirmishes over e-book pricing are set to spread.

The last page of every issue of Harvard Business Review is an interview with one incredibly successful person: an athlete, an astronaut, an admiral. But, after three years of doing these, we've started to discover that even the most successful careers are still careers in transition: the athlete is becoming an author; the astronaut, an activist; the admiral, a diplomat. Below, key lessons from this year's batch of...